Mercedes II BESS
BetaActiveBatteryERCOTLBNL
227.87 MW storage in Hidalgo, TX · In queue since May 2023 · Proposed COD October 2025
227.87 MW
Capacity
1
Components
Battery
2y 10m
In Queue
Facility Study
IA Status
COD target: 2025
Interconnection Timeline
Total Duration
2y 5m
Schedule
6 months past proposed COD
Facilities Study50%
Queue EntryMay 15, 2023
Interconnection request submitted to ISO/RTO
Interconnection StudyCurrent
ERCOT uses a serial "connect and manage" approach — fastest among major ISOs.
Typical: 18–30 months (fastest major ISO)
Interconnection Agreement
Interconnection agreement not yet executed
Typical: 30–60 days (negotiation)
Commercial Operation
Proposed COD: 2025-10-09
Project Details
State
TX
County
Hidalgo
Region
ERCOT
Developer
SMT Mercedes II, LLC
Utility
—
Entity
ERCOT
Point of Interconnection
TAP NORTH MERCEDES (BUS #8358) and NORTH WESLACO (BUS# 8357)
Data Source
LBNL
No news available for this project.